As you step onto the plane and are greeted by a flight attendant, you’re probably just thinking about finding your seat and getting your luggage stored away.
But that flight attendant saying hello? Well, they’re checking you out.
It’s not about appreciating your appearance, however. The cabin crew members are trained to notice things about you and make an assessment.
In a split second they decide whether you would be a help or hindrance should an emergency arise.
Experienced flight attendant Sjaak Schulteis tells The Sun the first thing on-air staff figure out is what language you speak, judging by what's in your hand.